You can open the outer seam (not the overlapped seam) on the outside of the leg. This will allow you to lay open the leg flatter. On the wrong side, use a scrap piece of jean from another pair, or a scrap piece of other fabric. Stitch around the patch, stitch thru the hole (worn area) in several spots, stitch around the hole. Resew the seam.
A local seamstress in your area should be easily able to handle this for you.
Pat - Seamstress in Sherburne NY, February 2010